Electric-arc lamp



Patented May 30, |899 E`""mmgY "i l .8. M Mw A1 w l M |N|Lm 7% o Pc m ERO m PAM m .Cnn o Bln m Dnm E .TM m JGm m Em. m Lp N Em w No. 626,I90.

(No Model) U'NiTED STATES PATENT* OFFICE.

JOHN R. PEPIN, OF CHICAGO, ILLINOIS.

ELECTRIC-'ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 626,190, dated May 30, 1899.

Application tiled October 2S, 1898. Serial No; 694,810. (No model.)

T0 (LM w/wm t may concern:

Be it known that I, JOHN R. PEPIN, a citizen of the United States, residing in the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Electric-Arc Lamps; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it pertains to make and 'use the same, reference being had to the accompanying drawings, forming a part hereof, in which- Figure l is a side elevation of my improved lamp, partly in section, through the axis ofV the lamp, showing the electromagnet, the upper-carbon holder, piston, and dash-pot. Fig.

2 is a similar View of the lamp with part of' the upper-carbon tube broken away and a flanged disk drawn in section to show the clutching and suspension devices in position when the lamp is in action.

The object of the invention is to construct an electric-arc lamp in which the operative mechanism is reduced to a few parts of simple and cheap construction and to obtain positive regulation of movements in direct line by the electric current and gravitation, to reduce the size and cost of electric-arc lamps, and to improve generally the construction and operation ofthe electric-arc lamp; and its nature consists'in the several parts and combinations of parts hereinafter described, and pointed out in the claims as new.

In the drawings, A is a bobbin, with iianges C C.

S is thesolenoid wound on the bobbin A.

B in Fig. l is a tube extending through the bobbin A, the top of the tube being closed.

E E is a bridge supporting the bobbin A and solenoid S.

F is a flanged disk to which the bridge E E is attached.

Y Y are rods fastened to a ring attached by screws to the inner side of the flanged disk F. These rods support the lower-carbon holder and the globe-holder.

Gis the upper-carbon-holding tube,inclosed at the top. From J[he top of this tube a pis ton-rod and piston extend into the dash-pot formed by the closed top of the tube B, as shown at D and d. The bottom of the tube G is slotted, as shown at W and W', and has an extension lug and pivot, as shown at L.

I-I is a plunger or soft-iron core affixed to the upper-carbonholding tube G and is movable up or down in the tube B.

I is a collar fastened by a set-screw to the -tube G to limit its downward movement.

O is a bracket attached to the yunder side of the flanged disk F.

K is a clutch pivoted on the lug L at the bottom of the carbon-holding tube G. i

IWI is a rod pivoted to the clutch K and extending through a hole in the bracket O, the rod being threaded at the upper end and provided with the nuts R R.

T is a pendulum-rod hung to an eye attached to the under side of the flanged disk F.

Vis a shoe attached to the lowerend of the pendulum-rod T.

Z is the lower globe and carbon holder, resting on the brace-plate which secures the rods Y Y and is pivoted on the rod Y, on which it swings, and is adjusted either in or out of position by the thumb-nut a.

is a hook to hold the globe while the lamp is being trimmed.

In use the operation of the lamp is as follows: The thumb-nut a is released and the globe andcarbon holder Z is turned at right angles to the brace plate which holds the rods Y Y. The upper carbon is then inserted in the tube G and the lower carbon into the lower-carbon holder Z and the globe placed over the same and swung, with the lower carbon, into position and locked with the thumbnut a. on the operative mechanism is in position as shown in Fig. 1. The collar I rests on the flanged disk F, supporting the tube G, with its plunger I-I and piston The rod M is suspended by the nuts R R, which rest on the bracket O. The upper carbon rests on the lower carbon and is perfectly free in the tube G. The clutch K is held by the rod M from contact with the upper carbon, as shown at the slot YV. The shoe V on the pendulumrod T rests against the tube G, above the slot IV. The solenoid S and the arc X are in series. When the circuit is closed, the core or plunger I-I is drawn upward into the tube B, as shown in Fig. 2, and the piston 0 Before the electric current is turned vIOO is pushed into the upper part of the tube or dash-pot, retarding the movement of the core or plunger H, both up and down. In the upward movement the weight of the rod M and clutch K causes the clutch K to fall against and clutch the carbon X, as shown in Fig. 2, and lifting it with the tube G the arc is struck. Thus H, G, I, K, M, and X forin asysteni. As the earbons bui-n away the resistance 0f the arc increases, and in obedience to gravitation the system H, G, 9, I, K, M, and X gradually falls till the nut on the rod M rests on the bracket, as shown at P in Fig. l. The nut R comes in contact with the bracket O before the collar I reaches the flanged disk F, and as the tube G continues to descend after the nut on the rod M rests on the bracket O the free end of the clutch K is lifted by the rod M, freeing the carbon X. The lamp feeds andthe plunger, together with the tube G and rod M, rises and causes the clutch K to again engage and clutch the carbon increases until R ,when thecircuit breaks and the lamp is dead.

Vhat I claim as new, and desire to secure by Letters Patent, is-

l. The combination in an electric-arc lamp of an electromagnet, a central tube, asoftiron core, a tube within said core, a rod and piston, a clutch pivoted to a lug on said tube, a rod pivoted on said clutch,abracket,a [lange or base supporting a magnet, a carbon held in the carbon-holding tube, and a collar adjusted by a set-screw to a carbon-holdin g tube adapted to hold the tube and the carbon when the lamp is dead, substantially as described and for the purposes specied.

2. The combination, in an electric-arc lamp, of an electromagnet, a central tube with closed top,a soft-iron core or plunger, a tube through the center of said core and affixed thereto, said tube having a closed top, a piston-rod and piston extending from and affixed to the top of said tube, a clutch pivoted to the lower end of said tube, a rod pivoted to the free end of said clutch, a bracket to guide said rod, and to support the nuts thereon and operate the clutch, a flanged disk or base supporting the magnet, a bracket and eye on its Aunder side, a carbon held within a carbonholding tube, clutched by a clutch pivoted at its lower end, with a pendulum-rod hung on an eye attached to the under side of the iianged disk or base, said pendulum-rod having a shoe affixed thereto, substantially as described and for tlie purposes specified.

JOHN R. PEPIN.

Witnesses:

.TULIUs RUBINSTEIN, FRANK MAiss. 

